SetServiceBits

The SetServiceBits function registers a service type with the service control manager and the Server service. The Server service can then announce the registered service type as one it currently supports. The NetServerGetInfo and NetServerEnum functions obtain a specified machine's supported service types.

A service type is represented as a set of bit flags; the SetServiceBits function sets or clears combinations of those bit flags.

BOOL SetServiceBits(
  SERVICE_STATUS_HANDLE hServiceStatus,
                    // service status handle
  DWORD dwServiceBits,
                    // service type bits to set or clear
  BOOL bSetBitsOn,  // flag to set or clear the service type bits
  BOOL bUpdateImmediately
                    // flag to announce server type immediately
);
 

Parameters

hServiceStatus

A handle to the information structure for a service. A service obtains the handle by calling the RegisterServiceCtrlHandler function.

dwServiceBits

A set of bit flags that specifies a service type.

Certain bit flags (0xC00F3F7B) are reserved for use by Microsoft. The SetServiceBits function fails with the error ERROR_INVALID_DATA if any of these bit flags are set in dwServiceBits. The following 18 bit flags are reserved for use by Microsoft:

Reserved Bit Flag	Value
SV_TYPE_WORKSTATION	0x00000001
SV_TYPE_SERVER	0x00000002
SV_TYPE_DOMAIN_CTRL	0x00000008
SV_TYPE_DOMAIN_BAKCTRL	0x00000010
SV_TYPE_TIME_SOURCE	0x00000020
SV_TYPE_AFP	0x00000040
SV_TYPE_DOMAIN_MEMBER	0x00000100
SV_TYPE_PRINTQ_SERVER	0x00000200
SV_TYPE_DIALIN_SERVER	0x00000400
SV_TYPE_XENIX_SERVER	0x00000800
SV_TYPE_SERVER_UNIX	0x00000800
SV_TYPE_NT	0x00001000
SV_TYPE_WFW	0x00002000
SV_TYPE_POTENTIAL_BROWSER	0x00010000
SV_TYPE_BACKUP_BROWSER	0x00020000
SV_TYPE_MASTER_BROWSER	0x00040000
SV_TYPE_DOMAIN_MASTER	0x00080000
SV_TYPE_LOCAL_LIST_ONLY	0x40000000
SV_TYPE_DOMAIN_ENUM	0x80000000

Certain bit flags (0x00300084) are defined by Microsoft, but are not specifically reserved for systems software. The following are these four bit flags:

Bit Flag Constant	Value
SV_TYPE_SV_TYPE_SQLSERVER	0x00000004
SV_TYPE_NOVELL	0x00000080
SV_TYPE_DOMAIN_CTRL	0x00100000
SV_TYPE_DOMAIN_BAKCTRL	0x00200000

Certain bit flags (0x3FC0C000) are not defined by Microsoft, and their use is not coordinated by Microsoft. Developers of applications that use these bits should be aware that other applications can also use them, thus creating a conflict. The following are these 10 bit flags:

Value	Value
0x00004000	0x02000000
0x00008000	0x04000000
0x00400000	0x08000000
0x00800000	0x10000000
0x01000000	0x20000000

bSetBitsOn

Specifies whether the function is to set or clear the bit flags that are set in dwServiceBit. If this value is TRUE, the bits are to be set. If this value is FALSE, the bits are to be cleared.

bUpdateImmediately

Specifies whether the Server service is to perform an immediate update, announcing the new service type. If this value is TRUE, the update is to be performed immediately. If this value is FALSE, the update will not be performed immediately.

Return Values

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

QuickInfo

  Windows NT: Requires version 3.5 or later.
  Windows: Unsupported.
  Windows CE: Unsupported.
  Header: Declared in lmserver.h.
  Import Library: Use advapi32.lib.

See Also

Services Overview, Service Functions, NetServerGetInfo, NetServerEnum, RegisterServiceCtrlHandler, SetServiceStatus